AGMA Fine Pitch Tolerances / Quality Grades for Gears
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The gear tolerance chart below, lists the more common tolerance or quality specifications assigned for Spur, Helical and Herringbone type gears. Typically, the AGMA tolerance or quality number is provided on the engineering drawing face as part of a general requirements specification, such as a flag or delta note.
AGMA - Fine Pitch Gear Tolerances |
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AGMA Quality (Tolerance) Designation | Number. of Teeth and Pitch Diameter. | Diametral Pitch Range | Tooth to tooth Composite Tolerance | Total Tolerance |
10 | Up to 20 Teeth Over 20 Teeth Up to 1.999" Over 20 teeth 2" to 3.999" Over 20 teeth 4" and over |
20 to
200
20 to 200 20 to 200 20 to 200 |
.0007
.0005 .0005 .0005 |
.0010
.0010 .0012 .0014 |
11 | Up to 20 teeth Over 20 teeth Up to 1.999" Over 20 teeth 2" to 3.999" Over 20 teeth 4" and over |
20 to
200
20 to 200 20 to 200 20 to 200 |
.0005
.0004 .0004 .0004 |
.0007
.0007 .0009 .0010 |
12 | Up to 20 teeth Over 20 teeth Up to 1.999" Over 20 teeth 2" to 3.999" Over 20 teeth 4" and over |
20 to
200
20 to 200 20 to 200 20 to 200 |
.0004
.0003 .0003 .0003 |
.0005
.0005 .0006 .0007 |
13 | Up to 20 teeth Over 20 teeth Up to 1.999" Over 20 teeth 2" to 3.999" Over 20 teeth 4" and over |
20 to
200
20 to 200 20 to 200 20 to 200 |
.0003
.0002 .0002 .0002 |
.0004
.0004 .0004 .0005 |
14 | Up to 20 teeth Over 20 teeth Up to 1.999" Over 20 teeth 2" to 3.999" Over 20 teeth 4" and over |
20 to
200
20 to 200 20 to 200 20 to 200 |
.00019
.00014 .00014 .00014 |
.00027
.00027 .00032 .00037 |
15 | Up to 20 teeth Over 20 teeth Up to 1.999" Over 20 teeth 2" to 3.999" Over 20 teeth 4" and over |
20 to
200
20 to 200 20 to 200 20 to 200 |
.00014
.00010 .00010 .00010 |
.00019
.00019 .00023 .00027 |